The Dangers of Carbon Monoxide and How to Protect Your Home

Carbon monoxide (CO) is a colorless, odorless gas that can be deadly if inhaled in large amounts. Unlike carbon dioxide (CO₂), which is naturally exhaled during breathing and is relatively harmless at normal levels, carbon monoxide is a byproduct of incomplete combustion from fuel-burning appliances such as gas water heaters, furnaces, stoves, and fireplaces. When these systems aren’t properly vented, maintained, or installed, they can leak CO into your home, creating a silent and potentially fatal hazard.

Gas water heaters, especially older or poorly maintained units, can be a significant source of carbon monoxide if the burner or exhaust system malfunctions. Cracked heat exchangers, blocked flues, or backdrafting can all allow CO to seep into living spaces. What makes CO so dangerous is how quickly it can affect the human body—symptoms of poisoning include headaches, dizziness, nausea, confusion, and in severe cases, loss of consciousness or death. Because the gas is invisible and undetectable by smell, many people don't realize there’s a problem until it’s too late.

Recognizing the signs of CO buildup is crucial, but prevention is even more important. That’s why Diablo Water Heaters includes a free carbon monoxide detector with every gas water heater installation—because your safety is our top priority. We also inspect all venting systems during service calls and make sure your equipment meets modern safety standards. Proper installation and ventilation, along with annual maintenance, go a long way in preventing CO exposure.

Every homeowner should be proactive when it comes to carbon monoxide safety. Install CO detectors near all sleeping areas, and test them monthly. Know the symptoms of exposure and never ignore an alarm. With expert installation and reliable monitoring, you can enjoy the comfort of your water heater without worrying about the hidden dangers. At Diablo Water Heaters, we don’t just install equipment—we help protect your home and your family.